2008 Mercedes-Benz S550 Repair and Maintenance

A guide to problems, costs, maintenance and repair for your 2008 Mercedes-Benz S550

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2008 Mercedes-Benz S550
$
276
to $
463
2008 Mercedes-Benz S550
$
93
to $
178
2008 Mercedes-Benz S550
$
202
to $
476
2008 Mercedes-Benz S550
$
378
to $
1,515
2008 Mercedes-Benz S550
$
1,408
to $
3,562

2008 Mercedes-Benz S550 Problems

Oil Seepage on Back of the Cylinder Heads

The Mercedes Benz S550 may have engine oil seeping or leaking from the back of the cylinder heads. This is commonly misdiagnosed as leaking valve covers.

On the back of the cylinder heads there are three, in total, plastic expansion plugs that plug access ports to the camshafts. These plugs are well known for seeping oil, and leaking if left unattended. The oil will run down the back of the engine and eventually make it to the ground. 

Replacement of these three plastic plugs is extremely simple, and should be done as regular maintenance. The recommended interval for replacement is every 60,000 miles.

Stalling and/or "Crank no Start" Due to Failed Crankshaft Position Sensor

The engine may develop a stalling and/or no start condition due to a failed crankshaft position sensor.

Cracked Driveshaft Flex Discs May Cause Driveshaft Movement/Vibration

A vibration felt through the center floor of the vehicle can be caused by driveshaft flex discs, which crack and shred, causing excessive driveshaft movement. Not repairing these can cause damage to the driveshaft center support bearing, or, in the worst case scenario, damage to the transmission or differential.

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2008 Mercedes-Benz S550 Recalls

Internal Failure of Front Interior Control Module

Transistors used in the front signal acquisition and actuation module (SAM-F) may have been damaged during module assembly. As a result, the module could fail without warning, increasing the risk of a crash. Dealers will inspect and replace the affected modules as necessary. This recall is scheduled to begin on May 2, 2008. The Mercedes-Benz recall number is 2008 030005.

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